Carbon pack and sheet-form holder



June 3, 1930. K. R. DENCKLAU 1,761,106

CARBON PACK AND SHEET FORM HOLDER Filed Oct. 1929 2 Sheets-Sheet 1Inventor MP1. 1? JI/I/(VKZAU.

Attorney June 3, 1930. K. R. DENCKLAU 1,761,106

CARBON PACK AND SHEET FORM HOLDER Filed Oct. 1, 1929 2 Sheets-Sheet 2jta 5. r y 551 2; 15" i: i

Inventor $09.70-

EZ K142; K Jaw/mm 4 A iiorney Patented June 3, 1930 PATENT orrlcs KARLB. DENOKLAU, OI PLAIN'FIELD, NEW JERSEY CARBON PACK AND SHEET-FORKHOLDER Application filed October 1, 1929. Serial Ho. 888,452.

This invention relates to improvements in carbon packs and sheet formholders for use in typewritersand other analogous printing machineswherein duplicate copies of the original to be printed are desired.

0 copy or form sheets are interposed and held against shifting, the saidback strip being foldable intermediate the carbon packs as to assume astacked formation preparatory to the seating of the respective packsinto the typewriting machine.

Another object of the invention is to provide a continuous backing stripon which carbon packs are carried at spaced distances in between whichthe form sheets or tickets may be inserted, and means for permitting allof the tickets or form sheets to e grasped and rapidly pulled frombetween the carbon sheets so as not to injure the carbon sheets wherebythe said strip may again be used by the insertion of new form s eets ortickets for those removed, and by which the life of the carbon sheets isextended, thus effecting a saving over the present method of dispensingwith the carbon sheets after but 0 one use of the same.

A further object of the invention is the provision of a carbon pack ofthe kind mentioned wherein lithograph forms may be used which isimpracticable in the present construction of continuous carbon packswherein the form sheets or tickets are rinted on continuous strips,which printing is performed on the circular shaped type set illustratedin the accompanying drawings, 1n which:

Figure 1 is a perspective view of my improved carbon pack showing thesame folded in stacked formation.

Figure 2 is a vertical longitudinal sectional view.

Figure 3 is an enlarged detail sectional elevational view showing thehinged joint between the respective form sections.

Figure 4 is a detail vertical sectional view taken at the fold betweentwo adjacent sections. Y

Figure 5 is a reatly enlarged vertical transverse sectiona view.

Figure 6 is a fragmentary plan view of the folding joint between twoadjacent sections.

Figure 7 is a greatly enlarged vertical transverse sectional view on theline 77 of Figure 6.

Figure 8 is an enlarged detail sectional view on the line 88 of Figure6.

Figure 9 is a fragmentary perspective new of the uppermost carbon sheet.

Figure 10 is a detail sectional view showing a slight modification ofhinged joints between two adjacent form sections.

Referring to the drawings by reference characters, the numeral 10designates a flexible elongated strip which may be of any desired sounddeadening material, and which strip is scored transversely at evenspaced distances therealong as at 11 to divide the strip into aplurality of contiguous sections which are foldable in a zig-zag mannerinto stacked formation as clearly shown in Figures 1 and 2 of thedrawing. Each foldable section may be termed a frame or unit and in viewof the fact that all of the said sections or units are identical, adescription of one will suflice for all.

Each unit or frame has its longitudinal side edges turned inwardly as at12 and 13, respectively, while disposed beneath the inturned edge 12 areone of the side edges of a plurality of carbon sheets 13, the saidsheets being fixedly held in position by removable fastening elements 14which pass through the inturned edge or flange 12 and carbon sheets tosecure the said sheets in the holder or back strip 10. A transversestrip 15 is secured to the back strip 10 to form. the bottom of eachframe or unit while carried by the back strip adjacent the top of eachsection is a flexible bendable tongue 16 which is adapted to passthrough the opening 17 provided in the extending tab 18 carriedby theoutermost carbon sheet 13. The tab is provided with a recess 19 forreceiving the bent over portion of the tongue 16' so that the saidtongue is countersunk with the top surface of the tab as not tointerfere with the insertion of the strip in a typewriter or otherprinting machine. It mi ht be mentioned that the staples 14 may 1i ewisebe countersunk for the same reason as the tongue 16 and to also maintaina relatively even thickness throughout the unit.

The strip 10 intermediate the respective frames or units is providedwith openings 20 while the top of the carbon sheets 13 are cut away asat 21 so as to aline with certain walls of the openings as clearly shownin Figure 6 for a purpose to be presently explained. Interposed betweenthe carbon sheets 13 are the copy sheets or tickets 22, while overlyingthe outermost carbon sheet is the original copy sheet 23 to which a rearcopy sheet 2 1 is connected, the joint between the back copy sheet 24and the front original sheet 23 being perforated to enable the two to beseparated upon removal of the origi nal and copies from the pack. Whenthe original sheet 23 and the copy sheets have been positioned relativeto the carbon sheets, the side edges abut the inner edges of theinturned portions 12 and 13 of the flexible strip and together with thecarbon copy they form a thickness equal to the thickness of thelongitudinal side edges of the pack will flatly pass over the platen orroller of the typewriting machine.

To insert the copy sheets 23 intermediate the carbon sheets, the tongue16 is bent up to enable the carbon sheet to be opened up similar to abook, whereupon the copy sheets may be inserted and the tongue 16 bentdown into engagement with the tab 18 as clearly shown in Figure 8 of thedrawing. By fastening the free edges of the uppermost carbon sheets, theinserted copy sheets are held against accidental shifting and separationrelative to the carbon sheets; Assuming that the original and copysheets are in the position shown in the drawings and just described, andthe carbon pack is inserted into a .typewriting machine, the machine isoperated to type the necessary information upon the original copy 23,thus producing carbon copies upon the insert sheets 22. After the.necessary matter has been printed, the operator inserts the thumb andforefinger of the hand through the opening 20 at the top of the pack andproceeds to grasp the front and back sheets and pulls upward upon thesame whereupon all of the copy sheets are simultaneously removed Withoutdisturbing the fastening means b which the carbon sheets are held to thestrip 10. The platen of the typewriter may now be operated in the usualmanner in order to bring the next carbon pack into position with respectto the platen of the typewriter by constructing the back strip 10 of asound deadening material, the noise incident to the striking of the keysof the typewriter upon the carbon pack is greatly reduced. Such a carbonpack as has been shown and described .will be found most useful inpreparing invoices and bills where several carbon copies together withan original are to be prepared. It will be noted that the carbon sheetsmay be used over and over again until sufiiciently worn as to be of nofurther value as blank copy sheets may be inserted in the respectiveholders after the type sheets have been removed therefrom. Should thecarbon paper become worn, the same may also be replaced by removing thefastening elements or staples 14 and substituting new carbon sheetstherefor and by replacing the said fastening elements. Althoughfastening elements in the nature of staples have been shown, other suchremovable devices such as stitching may be used if desired.

For the purpose of accommodating the carbon pack in typewriting machineshaving a tooth Wheel feed, I provide the longitudinal edges of the stripwith equidistantly spaced openings 25 which openings receive the teethof the wheel during feeding of the strip through the machine. Thisserves to prevent possible shifting of the strip during passage throughthe machine.

From the foregoing description it will be seen that I have provided acontinuous carbon pack in which no time is lost in disposing of thecarbon after removal of the copies of the printed sheets from themachine and wherein the life of the carbon sheets is extended thuseffecting a great saving in the cost of carbon paper.

While I have described what I deem to be the most desirable embodimentof my in-- vention it is obvious that many of the details may be variedwithout in any way departing from the spirit of my invention, and Itherefore do not limit myself to exact details of construction hereinset forth, nor to anything less than the whole of my invention, limitedonl by the appended claims.

Having thus escribed the invention, what I claim as new and desire tosecure by Letters Patent is 1. A combined carbon pack and sheet formholder comprising a back strip of foldable material, and carbon packunits fixedly secured along one of the sides of said back stripat'spaced intervals therealong so that the opposite side and edges ofeach carbon pack unit are free for the insertion of form sheets ortickets therebetween.

2. A combined carbon pack and sheet form holder comprising a back stripof foldable material, carbon pack units fixedly secured along one of thesides of said back strip at spaced intervals therealong so that theopposite side and edges of each carbon pack unit are free for theinsertion of form sheets or tickets therebetween, and means fordetachably securing the free side edge of the outermost carbon sheet tothe ad- .jacent side edge of said back strip for bolding the insertedform sheets or tickets in,assembled position.

3. A combined carbon pack and sheet form holder comprising a back stripof foldable material, carbon pack units fixedly secured along one of thesides of said back strip at spaced intervals therealong so that theopposite side and edges of each carbon pack unit are free for theinsertion of form sheets or tickets therebetween, means for detachablysecuring the free side edge of the outermost :carbon sheet to theadjacent side edge of said back strip for holding the inserted formsheets or tickets in assembled position, said means including a tab extending beyond the free edge of said outermost carbon sheet, and abendable tongue carried by said strip and extending through an openingprovided in said tab and adapted to be bent flat against the tab.

4:. In a combined carbon pack and sheet form holder, a flexible backstrip having one of its side edges bent inwardly over upon itself, aplurality of alined carbon sheets having one of the side edges disposedbeneath the inwardly turned edge of said strip, means 'for fixedlysecuring said carbon sheets beneath said inturned edge, and means fordetachably securin the opposite edge of the outermost carbon s eet tothe adjacent edge of the said strip.

5. In a combined carbon pack, a flexible back strip, carbon pack unitsfixedly secured to said back strip at spaced intervals along one of theside edges thereof, means for de tachably securing the free edge of theoutermost carbon sheets to the adjacent edge of said back strip forsecuring said carbon sheets downagainst said strip, said strip havingopenings therein intermediate said carbon pack units, the tops of thecarbon sheets of the said units being cut away to aline with certain ofthe walls of said openings, substantially as and for the purposespecified.

6. In a combined carbon pack and form holder, an elongated flexiblestrip embodying a plurality of alternatel foldable sections to enablethe strip to be folded in a zig-zag manner into stacked formation, andsheets of carbon paper secured along one edge of said sections for theinsertion of copy sheets therebetween.

7. In a combined carbon pack and form holder, an elongated flexiblestrip embody-'

